Description
The Fenwal 35‑679652‑551 is a microprocessor‑based ignition control module engineered for reliable hot surface ignition (HSI) in commercial and industrial gas‑fired heating systems. Designed to meet the demanding requirements of high‑BTU burners, this ignition control board delivers precise ignition sequencing, purge timing, and safe flame supervision to help ensure consistent startup and dependable operation.
Key Features
- Microprocessor‑controlled hot surface ignition for reliable and repeatable startups.
- Single Try, Lockout on Flame Loss safety logic to prevent dangerous cycling after a failed ignition.
- Works with 24 VAC control voltage and supports hot surface ignitors rated up to 24/120/240 VAC.
- Precise timing sequences including 15 s pre‑purge, 15 s inter‑purge, and 30 s post‑purge (full‑time power).
- Integrated combustion blower relay, thermostat and pressure switch inputs.
- On‑board diagnostics help simplify troubleshooting and service.
